Showing 1–15 of 15 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Takeshi Chonan | Sumitomo Metal Mining Co. | 26 |
| 2 | Mika Okada | Sumitomo Metal Mining Co. | 25 |
| 3 | Hirofumi TSUNEMATSU | Sumitomo Metal Mining Co. | 23 |
| #4 | Kaoru Hishiki | Ohkuchi Materials Co. | 15 |
| #5 | Hideaki Fukuyama | Sumitomo Metal Mining Co. | 12 |
| #6 | Yukihiro Koyama | Yazaki | 10 |
| #7 | Keiichi Otaki | Ohkuchi Materials Co. | 7 |
| #7 | Kotaro Tomeoka | Ohkuchi Materials Co. | 7 |
| #9 | Ryoichi Yoshimoto | Nichia | 5 |
| #10 | Shigeru Hosomomi | Ohkuchi Materials Co. | 3 |
| #10 | Ryo Togashi | Sumitomo Metal Mining Co. | 3 |
| #12 | Shunichi Kidoguchi | Ohkuchi Materials Co. | 2 |
| #12 | Ryouichi Yoshimoto | Ohkuchi Materials Co. | 2 |
| #12 | Juntaro Mikami | Sumitomo Metal Mining Co. | 2 |
| #15 | Takahisa KAWANO | Sumitomo Metal Mining Co. | 1 |